US 11,796,904 B2
Phase modulator, lighting system, and projector
Yoshiaki Kouyama, Kanagawa (JP); Osamu Akimoto, Tokyo (JP); Takahiro Mochizuki, Kanagawa (JP); and Masa Tanaka, Kanagawa (JP)
Assigned to SONY CORPORATION, Tokyo (JP); and SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 16/634,590
Filed by SONY CORPORATION, Tokyo (JP); and SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Jul. 24, 2018, PCT No. PCT/JP2018/027680
§ 371(c)(1), (2) Date Jan. 28, 2020,
PCT Pub. No. WO2019/031230, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 2017-152624 (JP), filed on Aug. 7, 2017.
Prior Publication US 2020/0159102 A1, May 21, 2020
Int. Cl. G03B 21/20 (2006.01); G02F 1/01 (2006.01)
CPC G03B 21/2073 (2013.01) [G02F 1/0105 (2013.01); G02F 1/0123 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A phase modulator comprising:
a phase distribution arithmetic unit configured to:
generate, in a case of a reproduction of a same reproduction image over a plurality of frames or a plurality of subframes by a light phase modulation element, target phase distribution data based on a predetermined phase distribution calculation method, wherein the target phase distribution data is allowed to reproduce the same reproduction image in at least two adjacent frames among the plurality of frames or in at least two adjacent subframes among the plurality of subframes and that changes at least some objective pixels among a plurality of pixels in the light phase modulation element to average an applied voltage to each pixel of the plurality of pixels during a period over the plurality of frames or the plurality of subframes; and
change a phase distribution in the target phase distribution data based on a temporal change in an initial phase in the predetermined phase distribution calculation method.